Fountain pen



Allg. 22, 193.3. v R p MARKS-[Enq 1,923,633

FOUNTAIN `PEN Original Filed July 9, 1929 Flc-s. 7.

Patented Aug. 22, 1933 UNITED STATES PATENT OFFICE original application July 9, 1929, sei-iai No. 376,972, and in Austria March 23, 1929. Divided and this application January 7, 1932.

Serial No. 585,344

s claims. (cl. 12o-49) My invention relates to fountain pens consisting of a tubular system which comprises a nib carrier and a nib protecting shell slidablyv. mounted in said tubular system.

This application is a division of my copending application for Letters Patent of the United States for improvements in fountain pens, led July 9, 1929, Serial No. 376,972.

The invention has for its object to provide means for suiiiciently securing the protecting shell in its outmost positionn relation to the nib carrier, so that said protecting shell is prevented in its outmost position from casually moving inwards. Moreover the invention comprises means for limiting the stroke of this protecting shell.

According to the invention a spring member is provided which engages said shell in its outmost position and thus secures the same suiiiciently. The tubular system includes an outer tube, an inner tube connected thereto and forming the nib carrier and a protecting shell,. a spring pawl being provided which may be formed by a longitudinal cut out portion of the Wall o1- the inner tube and engagesthe said protecting shell in its outmost position.

The spring member may also be formed by a portion cut out from the wall of the inner tube.

One portion of the tubular system may have a projection and another portion thereof a longitudinal groove said projection engaging said groove for limiting the stroke of the protecting shell.

In the drawing Fig. 1 is a longitudinal section through the improved fountain pen. Fig. 2 is a longitudinal section taken on the line 2-2 in Fig. 1. Figs. 3 and 4 are similar sections of modifications of the means for securing the protecting shell in its outmost position. Fig. 5 is a longitudinal section through a fountain pen with further modifications. Figf is a longitudinal section taken. on the line 6-6 in Fig. 5. Fig. 7 is a longitudinal. sectional View showing the pen in the writing position, and Fig.` 8 is `a detail transverse sectional view on the line 8 8 of Fig. 1 and .on a somewhat enlarged scale.

The illustrated fountain pen has an outer tube 2 to which an inner tube 4 is secured which forms or carries the nib holder. Between the tubes 2 and 4 a tubular shell 1 is slidable, which protects the nib and is provided with a lid 5fat its outer end which is opened as soon as the shell 1 is moved outwardly along the member 2.

In order to prevent the protecting shell 1 when in its outmost position from casually moving inwardly and .entering the outer tube 2, a longitudinal elastic tongue or spring 24 is secureqd on A`the inner wall of the inner tube 4 say by riveting, the free end of such spring extends through a slot in the inner tube and is provided with a rounded projection 25, which extends outwards L and snaps over the inner edge 6 or in a rest 'l of the protecting shell 1, when the latter is completely moved outwards, so that said shell is `655i suiiic' tly held in said position. By a slight pressure the projection 25 orv the spring 24 yield so'that the shell 1 may be moved inwards.

v Instead of a separatedspring or tongue, a 70.

tongue 26 (Fig. 5) may be provided, which is formed by cutting the wall of the inner tube 4 (Fig. 2). In both cases the tongue may Ialso be provided with a bent, end 27 (Figs. 4, 5), which replaces the aforesaid projection and snaps over the inner edge 6 or in a rest 'l of the shell 1 (Figs. 1, 2). Q Moreover a similar separate or cut out longitudinal tongue or spring 28 (Figs. 5, 6) may be provided, the bent portion of which engages a longitudinal groove 29 of the shell 1 and is guided therein, so that the shell 1 is prevented from rotating about the inner tube 4 or iz the outer tube 2. For the same purpose a small screw 30 (Fig. 1) may be screwed in the wall of 85' the inner tube 4, which may be provided thereat with a reinforcing ring 31 in order to aord the required thread for the screw 30. The head of such screw engages the inner longitudinal groove 29 of the shell l.

What I claim is:

l. A fountain pen comprising an inner shell forming anib carrier, an outer shell ati the outer end of the inner shell and spaced therey from, said innershell having a longitudinallyarranged stop spring, 'free to move outwardly at its end nearest the nib, and a protecting shell slidably mounted between the inner and outer shells and having a stop shoulder at its inner end, engageable directly by the free end of the spring tongue to lock said protecting shell when the same is drawn outwardly to enclose and protect the nib.

2. In a fountain pen, va tubular system comprising an outer tube and an inner tube connected thereto' and forming the nib carrier, a protecting shell slidably mounted on the inner and in the outer tube, and having a longitudinal groove, said inner tube having a member engagno ing said groove and projecting outwardly from the wall of the inner tube.

3. In a fountain pen, a tubular system comprising an outer tube and an inner tube conand in the outer tube, and having a, longitudinal groove, said inner tube having a, projecting mem- Der engaging said groove, said member passing through the inner tube and screwedinto a re,

nforcing ring in the latter.

ROBERT PETER MARKSI'EIN. 

